Question: Which ensemble of buildings has the smallest intensity of luminosity?
Paraphrase: Which group of buildings has the lowest intensity of luminosity?
SPARQL (Wikidata): select ?ent where { ?ent wdt:P31 wd:Q1497375 . ?ent wdt:P3041 ?obj . ?ent wdt:P31 wd:Q1497375} ORDER BY ASC(?obj)LIMIT 5 
Answer: Cape Arkona Lighthouse